I would try your local full auto repair shop that will offer you a set installation price if you purchase the part yourself.
the best thing to do is take it to the dealer. Trust me.
you will have to replace the window regulator.
You buy a service,repair manual or you take it to a shop
If the rear window on your 1998 Jeep Grand Cherokee Laredo will not open, you might have a failed window motor or actuator. You could also have a fuse that is blown or an issue with the window wiring.
In the fuse box.
Problem?
pls see... http://www.faqfarm.com/Q/What_is_wrong_when_the_front_passenger_power_window_motor_sounds_like_it%27s_going_to_work_but_then_stops_and_the_window_will_not_move_on_a_1999_Jeep_Grand_Cherokee
Ed McCahill has written: 'Chilton's Jeep Grand Cherokee 2005-09 repair manual' -- subject(s): Cherokee automobile, Jeep automobile, Maintenance and repair, Handbooks, manuals 'Jeep Grand Cherokee automotive repair manual' -- subject(s): Cherokee automobile, Jeep automobile, Maintenance and repair, Handbooks, manuals
The only differences are between a regular Cherokee and a Grand Cherokee.
I've included a link below in related links that will show you a YouTube video on How To fix the window regulator for your 99 Jeep Grand Cherokee.
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Dealer Warranty item.